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85 lines
1.8 KiB
C++
85 lines
1.8 KiB
C++
// This file is part of the "Irrlicht Engine".
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// written by Reinhard Ostermeier, reinhard@nospam.r-ostermeier.de
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// modified by Thomas Alten
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#include "CGUIImageList.h"
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namespace irr
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{
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namespace gui
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{
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//! constructor
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CGUIImageList::CGUIImageList(video::IVideoDriver *driver) :
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Driver(driver),
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Texture(0),
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ImageCount(0),
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ImageSize(0, 0),
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ImagesPerRow(0),
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UseAlphaChannel(false)
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{
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#ifdef _DEBUG
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setDebugName("CGUIImageList");
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#endif
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if (Driver) {
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Driver->grab();
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}
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}
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//! destructor
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CGUIImageList::~CGUIImageList()
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{
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if (Driver) {
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Driver->drop();
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}
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if (Texture) {
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Texture->drop();
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}
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}
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//! Creates the image list from texture.
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bool CGUIImageList::createImageList(video::ITexture *texture,
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core::dimension2d<s32> imageSize,
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bool useAlphaChannel)
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{
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if (!texture) {
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return false;
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}
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Texture = texture;
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Texture->grab();
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ImageSize = imageSize;
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ImagesPerRow = Texture->getSize().Width / ImageSize.Width;
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ImageCount = ImagesPerRow * Texture->getSize().Height / ImageSize.Height;
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UseAlphaChannel = useAlphaChannel;
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return true;
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}
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//! Draws an image and clips it to the specified rectangle if wanted
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void CGUIImageList::draw(s32 index, const core::position2d<s32> &destPos,
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const core::rect<s32> *clip /*= 0*/)
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{
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core::rect<s32> sourceRect;
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if (!Driver || index < 0 || index >= ImageCount) {
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return;
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}
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sourceRect.UpperLeftCorner.X = (index % ImagesPerRow) * ImageSize.Width;
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sourceRect.UpperLeftCorner.Y = (index / ImagesPerRow) * ImageSize.Height;
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sourceRect.LowerRightCorner.X = sourceRect.UpperLeftCorner.X + ImageSize.Width;
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sourceRect.LowerRightCorner.Y = sourceRect.UpperLeftCorner.Y + ImageSize.Height;
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Driver->draw2DImage(Texture, destPos, sourceRect, clip,
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video::SColor(255, 255, 255, 255), UseAlphaChannel);
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}
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} // end namespace gui
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} // end namespace irr
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